Where did you find a 3.14.7 version for the wdr4900?

Edit: I found it on the English site TPlink (I was on the french website)
http://www.tp-link.com/resources/software/TL-WDR4900_V1_130424.zip

Did you install it?
Is it using the stupid "login/logout" implemented on the last WR1043ND firmware?

Ok I installed
Logon is the same as 3.14.3
The APP (ios) is a piece of sh.t ...
The interface is incompatible with opera browser, it works with iexplorer
Tomorrow I test other functions

Can enable back NAT in this version yet?

Just installed.
Need a hard reset to work properly.
Daylight Saving bug fixed.
Media server is still a very big shit.

Globally the same than the preceding, no big work done...

Media server is still a very big shit. +1

"The interface is incompatible with opera browser, it works with iexplorer" :
In local : opera not compatible, we have the message "You have no authority to access this router!" after login
with iexplorer no problème

From web : "You have no authority to access this router!" message with opera and ie

With 3.14.3 no problem with opera and ie in local or web

Edit problem with chrome too from web

The TP-Link firmware quality decreases with the versions...
TP-Links has to change their firmware R&D department...

The firmware 3.14.7 Build 130424 Rel.72646n on router model TL-WDR4900 V1 still has a serious BUG:

- VPN connection disconnects within a minute < tested with various operating systems like OS X 10.6.8, 10.7.5, 10.8.3, 10.9.1 and Windows XP, Windows 7

as soon as the Hardware NAT option is disabled it works as expected.

Firmware Version:3.14.7 Build 130424 Rel.72646n
Hardware Version:WDR4900 v1 00000000

Any solution to the VPN-issues yet, except disabling the hardware NAT function? Is it possible to downgrade the firmware?